Doctor Doom has turned the Fantastic Four into unwilling contestants in his private arena, using a device to transport the team to locations around the world to battle monsters and supervillains of his choosing. Mr. Fantastic constructs a time machine to fight back, giving the team a path directly to Doom's tiny kingdom for a final confrontation. The shadow of Galactus looms in the background — the Skrull homeworld's destruction bearing the unmistakable hallmarks of the world-devourer's work, even if the Devourer himself never appears directly.